Block loops [Devs explanation asked]

I have a few questions about the possibility to create block loops usings Reactions gems and tempest shield.

If possible i'd like a dev to explain what's happening when two people with high block enter this kind of situation like two tempest shield users or two reckoning/riposte users.

Does the "attack/spell on block" go back and forth until someone's rng failed him or his there a system to avoid this kind of situation ?

Counterattack isn't able to create block loop because of build-in cooldown.
Tempest shield is different story. No doubt, there is some kind of hardcoded workaround to prevent 2x-tempest-shield-loop.

For an endless loop both players would need 100% or more chance to trigger a reactive gem. Block is at most 75% chance, the other gems are on cooldowns, so even without a hardcoded loop prevention of tempest shield, the loop would die fast.

Example: chance that person 1 + person 2 successfully block is 75%
-> tempest shield person 2 triggers upon attack of person 1
-> chance of 1 successful loop = chance that person 2 triggers tempest shield multiplied by chance that person 1 triggers tempest shield: 75% * 75% = 56%
-> chance of 2 successful loops: 0.75^4 = 0.316
-> chance of 3 successful loops: 0.75^6 = 0.188
-> ...

It's really substantial amounts of damage, but it will still die fast, I think you'd need to introduce a cwdt firestorm to get a real endless loop :)