If the fluid slot capacity in a machine is greater than 127000L (e.g. mixers and some large machines), 127 will be displayed no matter how much the fluid volume is greater than 127000L.
Unfixable, its a Stacksize if you didnt notice yet, those are limted to -128 to +127
This would have been a perfect use-case for the sole unsigned type that Java has… >.>
Ah but if only MC were programmed well.