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Is there any way to force a custom block in the Custom Block Library to invalidate cache on edit update?

I have created custom blocks in the Custom Block Library and placed instances of the blocks on a page in Block Layout. The blocks get cached for anonymous users.

Editing the custom block and saving does not invalidate the cache for those instances of the blocks. Looking in the “cache_render” table I see that caches for blocks get created through the Custom Blocks Library are set to never expire as a default with no options I can see available in the admin UI.

I have to actually “Flush All Caches” using the Devel module to have the changes appear, or another way I have found is to go to the Block Layout page and click the “Save Blocks” button without changing anything. The cahces for all the blocks will invalidate.

I don’t want to give access to Devel to an average content manager or have to try to explain that they have to do a non-obvious extra step to have their block content changes appear. Am I missing a setting in the UI that will invalidate the cache of those blocks on edit save?

I can cobble together a module that would add an extra submit handler that would invalidate the cache using Drupal::service('cache_tags.invalidator')->invalidateTags() if I can get the cachetags for all instances of the block on save … but I’m not sure how to get that info, and that just seems like a hack.

I’m hoping I’m just missing something.

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Is there any way to force a custom block in the Custom Block Library to invalidate cache on edit update?

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