Chests: Requested quantity systematically resets to item stack size when changing the item type

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To save some time setting up chests with 5 quality requests with large requested quantity, I sometime copy paste and just change the item type. Unfortunately, the number of item automatically resets to the stack size, so I have to use numpad to add some zeros, press E...

Arguably it could considered "not a bug", but what's the point to always reset the quantity that have already been setup previously?

ps: I'm looking forward to try the new quality buttons (already released in experimental), maybe it will make setting up chests faster.
ps2: Relevant topic discussing related chest management challenges with quality: viewtopic.php?f=5&t=121348