anyone using the the general ACF cache with redis rather than the default ehcache? I’m finding it’s just broke on ACF 2021 - cacheput fails

tried moving sessions over to redis on ACF 2021 earlier in the year and something went horribly wrong. Usage just kept going up and up in live environments and maxing out even quite expensive Azure redis servers. Had other projects going on so couldnt spend a lot of time investigating but it was not as simple as had hoped for sure