Bug in upgrades - gues account reveals all (only AOF)

[Stratego (dev)]

if you open the upgrade menu with a guest account you have the 80gems, if you then upgrade a given slot it doesn’t turn the slot green but remains in the previous color but reveals the next upgrade and so forth without costing gems.
so basically you can’t unlock units as a guest account but can reveal every upgrade without spending anything.
thought i rather post that here as it concerns the monetization

[Stratego (dev)]

i could notz reproduce: anyone experience this?