Enduring mana flask suffix mod only active during most recent activation

The "Enduring" mod says "Flask effect is not removed at full mana", then, with the "of Heat" mod you also cannot be frozen or chilled during flask effect, even with full mana.

This works as expected on activation, and the freeze immunity will be active during the duration of that activation. However, since mana flasks (maybe life flasks too, no clue) can be queued up by dumping all charges you have, it is common practice to mash that flask till all the charges are gone, which in my case gives 26,5 seconds of uptime. If you do this, however, the suffix mod will only be active during the most recent activation, after which the flask will remain active for another 21,2 seconds, but the suffix mod will not apply.

This is pretty easy to test if you have some chilled ground and an enduring flask of heat. Just stand on the ground and activate the flask twice, you will unchill, then rechill once the most recent activation runs out. The same is true for curse immunity flasks, i did not test any others.

That part can't be queued.