Distributed cache is not updated (U17)

Hi there
I was stress-testing my U17.1.0 solution, and suddenly I got a debug error, that some ipublished content was missing and couldnt be found.
I then got hammered with DISTRIBUTED CACHE IS NOT UPDATED, over 280 errors in about 30 minutes, and I found the umbracoCacheInstruction which had over 900 entries.

I set the
“Global”: {
“ServerRole”: “Single”

Even though I am not running cloud or loadbalancing, and it didnt help.

Clearing out the umbracoCacheInstruction did help and the error stopped.

Any thing else I can do to prevent this again?
Is there a way to check if the cache is building in .NET code?

DISTRIBUTED CACHE IS NOT UPDATED. Failed to execute instructions (691: '"[{\"RefreshType\":4,\"RefresherId\":\"900a4fbe-df3c-41e6-bb77-be896cd158ea\",\"JsonIdCount\":1,\"JsonPayload\":\"[{\u0022id\u0022:1173,\u0022key\u0022:\u00220c9d1e1a-0997-496d-93b6-837563a14dcd\u0022,\u0022changeTypes\u0022:\u0022RefreshNode\u0022,\u0022blueprint\u0022:false,\u0022publishedCultures\u0022:null,\u0022unpublishedCultures\u0022:null}]\"},{\"RefreshType\":4,\"RefresherId\":\"900a4fbe-df3c-41e6-bb77-be896cd158ea\",\"JsonIdCount\":1,\"JsonPayload\":\"[{\u0022id\u0022:1173,\u0022key\u0022:\u00220c9d1e1a-0997-496d-93b6-837563a14dcd\u0022,\u0022changeTypes\u0022:\u0022RefreshBranch\u0022,\u0022blueprint\u0022:false,\u0022publishedCultures\u0022:[\u0022*\u0022],\u0022unpublishedCultures\u0022:null}]\"}]"'). Instruction is being skipped/ignored

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