backend crash

I have problem with (pseudo) random backend crashes.
They seems to happen at one query, but not every time.

table:

--8<---------------cut here---------------start------------->8---
CREATE TABLE digitalocean.log (
    ts timestamp with time zone DEFAULT now() NOT NULL,
    actions jsonb NOT NULL,
    account text NOT NULL
);

ALTER TABLE ONLY digitalocean.log
    ADD CONSTRAINT log_ts_key UNIQUE (ts);
--8<---------------cut here---------------end--------------->8---







query:
--8<---------------cut here---------------start------------->8---
with x as (select jsonb_array_elements (actions->'actions')->'id' as id ,ts  from digitalocean.log where account='onet') select max(x.id::bigint) from x;
--8<---------------cut here---------------end--------------->8---





stacktrace from core:

--8<---------------cut here---------------start------------->8---
sudo gdb -c core /usr/lib/postgresql/12/bin/postgres    
GNU gdb (Debian 9.1-3) 9.1
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Reading symbols from /usr/lib/postgresql/12/bin/postgres...
Reading symbols from /usr/lib/debug/.build-id/20/7804ddc4a915f7f080ecec71883176fde6d69e.debug...
[New LWP 1820750]

warning: .dynamic section for "/usr/lib/x86_64-linux-gnu/libgnutls.so.30" is not at the expected address (wrong library or version mismatch?)
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `postgres: parallel worker for PID 1820747                                     '.
Program terminated with signal SIGABRT, Aborted.
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
50      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x00007f562e80555b in __GI_abort () at abort.c:79
#2  0x000055f675632af4 in ExceptionalCondition (conditionName=conditionName@entry=0x55f6758523f8 "!(result->tdrefcount == -1)", errorType=errorType@entry=0x55f67568a016 "FailedAssertion", 
    fileName=fileName@entry=0x55f675852008 "/build/postgresql-12-kUaQt8/postgresql-12-12.2/build/../src/backend/utils/cache/typcache.c", lineNumber=lineNumber@entry=2621) at ./build/../src/backend/utils/error/assert.c:54
#3  0x000055f6756309ae in find_or_make_matching_shared_tupledesc (tupdesc=) at ./build/../src/backend/utils/cache/typcache.c:2621
#4  0x000055f675632191 in assign_record_type_typmod (tupDesc=, tupDesc@entry=0x55f6768ac950) at ./build/../src/backend/utils/cache/typcache.c:1815
#5  0x000055f675383328 in BlessTupleDesc (tupdesc=0x55f6768ac950) at ./build/../src/backend/executor/execTuples.c:2056
#6  BlessTupleDesc (tupdesc=tupdesc@entry=0x55f6768ac950) at ./build/../src/backend/executor/execTuples.c:2052
#7  0x000055f6755804fe in elements_worker_jsonb (fcinfo=0x55f6768ab788, as_text=false, funcname=) at ./build/../src/backend/utils/adt/jsonfuncs.c:2030
#8  0x000055f67537f57f in ExecMakeFunctionResultSet (fcache=0x55f67689ee90, econtext=econtext@entry=0x55f67689df48, argContext=0x55f6768ad000, isNull=0x55f67689e5f8, isDone=isDone@entry=0x55f6768ab078) at ./build/../src/backend/executor/execSRF.c:606
#9  0x000055f6753a2b38 in ExecProjectSRF (node=node@entry=0x55f67689dc18, continuing=continuing@entry=false) at ./build/../src/backend/executor/nodeProjectSet.c:175
#10 0x000055f6753a2c1d in ExecProjectSet (pstate=0x55f67689dc18) at ./build/../src/backend/executor/nodeProjectSet.c:105
#11 0x000055f6753a3642 in ExecProcNode (node=0x55f67689dc18) at ./build/../src/include/executor/executor.h:239
#12 ExecResult (pstate=0x55f67689daa0) at ./build/../src/backend/executor/nodeResult.c:115
#13 0x000055f67538858c in ExecProcNode (node=0x55f67689daa0) at ./build/../src/include/executor/executor.h:239
#14 fetch_input_tuple (aggstate=aggstate@entry=0x55f67689d340) at ./build/../src/backend/executor/nodeAgg.c:406
#15 0x000055f67538a348 in agg_retrieve_direct (aggstate=0x55f67689d340) at ./build/../src/backend/executor/nodeAgg.c:1747
#16 ExecAgg (pstate=0x55f67689d340) at ./build/../src/backend/executor/nodeAgg.c:1562
#17 0x000055f67537499c in ExecProcNode (node=0x55f67689d340) at ./build/../src/include/executor/executor.h:239
#18 ExecutePlan (execute_once=, dest=0x55f676846288, direction=, numberTuples=0, sendTuples=, operation=CMD_SELECT, use_parallel_mode=, planstate=0x55f67689d340, estate=0x55f67689d098) at ./build/../src/backend/executor/execMain.c:1646
#19 standard_ExecutorRun (queryDesc=0x55f676847950, direction=, count=0, execute_once=) at ./build/../src/backend/executor/execMain.c:364
#20 0x000055f675379837 in ParallelQueryMain (seg=seg@entry=0x55f6767f9948, toc=toc@entry=0x7f562343f000) at ./build/../src/backend/executor/execParallel.c:1399
#21 0x000055f67522d70f in ParallelWorkerMain (main_arg=) at ./build/../src/backend/access/transam/parallel.c:1431
#22 0x000055f6754644d7 in StartBackgroundWorker () at ./build/../src/backend/postmaster/bgworker.c:834
#23 0x000055f675472504 in do_start_bgworker (rw=) at ./build/../src/backend/postmaster/postmaster.c:5770
#24 maybe_start_bgworkers () at ./build/../src/backend/postmaster/postmaster.c:5996
#25 0x000055f675472f92 in sigusr1_handler (postgres_signal_arg=) at ./build/../src/backend/postmaster/postmaster.c:5167
#26 
#27 0x00007f562e8d4fd6 in __GI___select (nfds=nfds@entry=5, readfds=readfds@entry=0x7ffc8caa4420, writefds=writefds@entry=0x0, exceptfds=exceptfds@entry=0x0, timeout=timeout@entry=0x7ffc8caa4380) at ../sysdeps/unix/sysv/linux/select.c:41
#28 0x000055f675473844 in ServerLoop () at ./build/../src/backend/postmaster/postmaster.c:1668
#29 0x000055f67547550d in PostmasterMain (argc=5, argv=) at ./build/../src/backend/postmaster/postmaster.c:1377
#30 0x000055f6751872b4 in main (argc=5, argv=0x55f67679dc40) at ./build/../src/backend/main/main.c:228
(gdb) quit
--8<---------------cut here---------------end--------------->8---


--8<---------------cut here---------------start------------->8---
 SELECT version();
                                                   version                                                    
-------------------------------------------------------------------------------------------------------------
PostgreSQL 12.2 (Debian 12.2-3.pgdg+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 9.3.0-7) 9.3.0, 64-bit
--8<---------------cut here---------------end--------------->8---

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