If only just straight upgrade (without any mods or mod settings being changed), then this would be strange.
The only change with Schall Recipe Scaling 1.1.0 is only related to Schall Tank Platoon 1.1.0, so should not be relevant to your case.
Can you check the mod settings, if they are altered or reset for any reason?
Also, are there any major changes in the mods you are using?
There is a sidenote about the scaled recipes. If the product has stack size of 1 only, then the scaled recipe will NOT be generated (as it would be identical to the original recipe).
This could happen if say, item A had stack size of 5 in 1.0. Now the game 1.1 (or some mods 1.1) changed it to stack size of 1 only. The scaled recipe would then disappear in the upgrade.
PS: The max allowed value of scale multiplier is 200. Are you refering to this setting?