When you try recursively a simple change (same length string) the error raises immediately.
Spoiler:
Code:
| applying patch `Custom font-size zlib1`
| looping over instructions
| skipping non-instruction Enabled(), PatchGroup() or Description()
| skipping non-instruction Enabled(), PatchGroup() or Description()
| FindZlib("reader_head") | hex:7265616465725f68656164
| ReplaceZlib(0, "font-size: 36px", "font-size: 39px")
| ReplaceZlib(0, "font-size: 28px", "font-size: 32px")
| ReplaceZlib(0, "font-size: 23px", "font-size: 27px")
| FindZlib("QWidget[small") | hex:515769646765745b736d616c6c
| ReplaceZlib(0, "font-size: 91px", "font-size: 91px")
| ReplaceZlib(0, "font-size: 77px", "font-size: 77px")
| ReplaceZlib(0, "font-size: 74px", "font-size: 74px")
| ReplaceZlib(0, "font-size: 71px", "font-size: 71px")
| ReplaceZlib(0, "font-size: 62px", "font-size: 62px")
| ReplaceZlib(0, "font-size: 60px", "font-size: 60px")
| ReplaceZlib(0, "font-size: 57px", "font-size: 59px")
| ReplaceZlib(0, "font-size: 55px", "font-size: 57px")
| ReplaceZlib(0, "font-size: 50px", "font-size: 53px")
| ReplaceZlib(0, "font-size: 47px", "font-size: 50px")
| ReplaceZlib(0, "font-size: 46px", "font-size: 49px")
| could not apply patch: i18: ReplaceZlib: new compressed data is 2 bytes longer than old data (try removing whitespace or unnecessary css)
--> ReplaceZlib: new compressed data is 2 bytes longer than old data (try removing whitespace or unnecessary css)
If you remove the space the error raises before.
Spoiler:
Code:
| applying patch `Custom font-size zlib1`
| looping over instructions
| skipping non-instruction Enabled(), PatchGroup() or Description()
| skipping non-instruction Enabled(), PatchGroup() or Description()
| FindZlib("reader_head") | hex:7265616465725f68656164
| ReplaceZlib(0, "font-size: 36px", "font-size:39px")
| ReplaceZlib(0, "font-size: 28px", "font-size:32px")
| ReplaceZlib(0, "font-size: 23px", "font-size:27px")
| FindZlib("QWidget[small") | hex:515769646765745b736d616c6c
| ReplaceZlib(0, "font-size: 91px", "font-size:91px")
| ReplaceZlib(0, "font-size: 77px", "font-size:77px")
| ReplaceZlib(0, "font-size: 74px", "font-size:74px")
| ReplaceZlib(0, "font-size: 71px", "font-size:71px")
| ReplaceZlib(0, "font-size: 62px", "font-size:62px")
| ReplaceZlib(0, "font-size: 60px", "font-size:60px")
| ReplaceZlib(0, "font-size: 57px", "font-size:59px")
| ReplaceZlib(0, "font-size: 55px", "font-size:57px")
| could not apply patch: i15: ReplaceZlib: new compressed data is 1 bytes longer than old data (try removing whitespace or unnecessary css)
--> ReplaceZlib: new compressed data is 1 bytes longer than old data (try removing whitespace or unnecessary css)

Perhaps I'm doing something bad or you should flush memory, redo loops or something, because I think this is really simple.
Good luck.