I was playing Anafenza, Kin-tree Spirit on Arena on a gaming laptop (so pc version). When I had 3 creatures that were tied for the Bolster effect, no counters were put on anything and I never got a prompt to choose a creature, it just skipped over the Bolster trigger when it resolved. This didn't happen in previous games, but just started today. Only difference was I had a Twinblade Paladin and life gain and the Twinblade triggered first and after that I never received a Bolster trigger. When Paladin was removed after boardwipe I got one trigger when there were no ties and a clear target, but When I had 3 creatures that were legal targets for Bolster nothing happened after the trigger (the trigger effect still showed it was on the stack and resolved and my opponent had nothing that prevented counter or etb)