We have fixed majority of the bugs which were reported with the Showdown Battle Engine Update.
Some of those changes were visual hence require you to redownload the client so please do so whenever you can.
Patch notes here: https://discord.com/channels/309968829226811402/828716708676108298/1489415088598421644, https://discord.com/channels/309968829226811402/828716708676108298/1489271542826406010
Thanks for your understand and we hope you are having fun with Spectate, Replay and fully working battle engine now.
More to come soon.
Best regards,
Team Pokémon Blaze Online