Facing a slow query issue

{"t":{"$date":"2023-05-16T17:42:08.530+05:30"},"s":"F",  "c":"-",        "id":23079,   "ctx":"monitoring-keys-for-HMAC","msg":"Invariant failure","attr":{"expr":"opCtx != nullptr && _opCtx == nullptr","file":"src/mongo/db/client.cpp","line":126}}
{"t":{"$date":"2023-05-16T17:42:08.533+05:30"},"s":"F",  "c":"-",        "id":23080,   "ctx":"monitoring-keys-for-HMAC","msg":"\n\n***aborting after invariant() failure\n\n"}
{"t":{"$date":"2023-05-16T17:42:23.896+05:30"},"s":"W",  "c":"COMMAND",  "id":20525,   "ctx":"conn7165924","msg":"Failed to gather storage statistics for slow operation","attr":{"opId":448018492,"error":"lock acquire timeout"}}

I am facing this issue on v4.4.3. I am using TTL indexes also.
Can anyone please explain this issue?