Recently I tested this mod with DurabilityTooltip and got issue that Durability Tooltip showing higher than Tool Stats Tooltip. Author found the solution by setting theirs ItemTooltipEvent to LOWEST. This is fixing the issue, but to have no conflicts in the future with other mods, he suggesting you to set yours to HIGHEST.

SuperMartijn642/DurabilityTooltip#7

Thanks for reporting this issue. I currently use the same code on Forge and Fabric so I don't have a way to set the Forge specific priority order but this is a bug and I will look into fixing this soon.

The issue was fixed on the other mod side and after some testing I didn't found any new issues with that. It is up to you to close it or fix it for the future incompatible cases. If you are considering to rise it still, I suggest to left the highest option in case of other mod really needing that.

Since this is still open, I'll add that with my modlist I've found that 'Advanced Tootips' (F3+H .. or via the Optifine 'video -> other' setting) will block ToolStats-Forge-1.19.2-12.0.2 from showing durability, ie:

I've not used DurabilityTooltip (but I use supermartijn642 mods for chunkloaders & landmines) since I prefer ToolStats because it shows durability in JEI /NEI /etc BEFORE I build a tool; with the settings:

"showEnchantability": true,
"alwaysShowEnchantability": true,
"showRepairCost": true,
"alwaysShowRepairCost": true,
"showHarvestLevel": true,
"showEfficiency": true,
"showDurability": true,
"alwaysShowDurability": true

The initial issue has finally been fixed on 1.19.4.

@markygnlg Durability is intentionally not displayed when F3+H is enabled because mojang has their own durability tooltip that is displayed.