Ruby ActiveRecord query_cache not being cleared after saved change to a model (upgrade active record 5 to 6)

After updating the active-record gem from 5 to 6 there were lot of failing specs related to the models not being refreshed even if there were a process that calls .save in the model and updates its data.
I couldn't find any documentation on how the query_cache gets cleared and if that behavior changed in the version but found nothing on the Changelog.

Quote from the Rails Guides about caching:

> Query caching is a Rails feature that caches the result set returned by each query. If Rails encounters the same query again for that request, it will use the cached result set as opposed to running the query against the database again.
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> [...]
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> The second time the same query is run against the database, it's not actually going to hit the database. The first time the result is returned from the query it is stored in the query cache (in memory) and the second time it's pulled from memory.
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> However, it's important to note that query caches are created at the start of an action and destroyed at the end of that action and thus persist only for the duration of the action. [...]

That means Ruby on Rails caches those queries for the duration of a request and deletes them at the end of the request. This behavior exists for a long time already, for example, here are the docs of Ruby on Rails 3.2.

Perhaps, if you shared some example code demonstrating your problem, we would be able to provide more detailed answers why your code is failing after the upgrade.