In BNet application on PC after you switch game region, button “Play” does nothing at first usage and only second attempt success. Relevant quote from log file:
I 2020-11-11 20:24:49.376900 [GameController] {Main} LaunchBinary: uid=hs_beta selectedRegion=EU binaryType=game
D 2020-11-11 20:24:49.389117 [InstallInfo] {Main} Operation status changed: opType=Execute oldStatus=Off newStatus=Pending agentUid=hs_beta
D 2020-11-11 20:24:49.389419 [ProductState] {Main} InstallState (hs_beta): GameLaunching=1
I 2020-11-11 20:24:49.575552 [InstallManager] {Main} Game launch options: programId=WTCG GAME_ACCOUNT= REGION=EU LOCALE=enUS LOCALE_AUDIO=enUS LAUNCH_64BIT=0
I 2020-11-11 20:24:49.577092 [InstallManager] {Main} Game launch options: programId=WTCG ACCOUNT=(hidden) ACCOUNT_TS=1605126289
D 2020-11-11 20:24:49.612669 [ProductState] {Main} InstallState (hs_beta): selectedRegion=eu regionalVersions=(android_amazon: {playable:true config_key:7d2ae8359537c6a0bfa8228e0466a196}, android_cn: {playable:false config_key:7de58693ffaac1c56439dd2268253469}, android_cn_huawei: {playable:false config_key:7de58693ffaac1c56439dd2268253469}, android_google: {playable:true config_key:7d2ae8359537c6a0bfa8228e0466a196}, cn: {playable:false config_key:7de58693ffaac1c56439dd2268253469}, eu: {playable:true config_key:7d2ae8359537c6a0bfa8228e0466a196}, ios: {playable:true config_key:7d2ae8359537c6a0bfa8228e0466a196}, ios_cn: {playable:false config_key:7de58693ffaac1c56439dd2268253469}, kr: {playable:true config_key:7d2ae8359537c6a0bfa8228e0466a196}, us: {playable:true config_key:7d2ae8359537c6a0bfa8228e0466a196})
E 2020-11-11 20:25:04.392808 [InstallManager] {Main} Operation 'Execute' was pending and expired. uid=hs_beta
D 2020-11-11 20:25:04.392976 [InstallInfo] {Main} Operation status changed: opType=Execute oldStatus=Pending newStatus=Off agentUid=hs_beta
D 2020-11-11 20:25:04.393252 [ProductState] {Main} InstallState (hs_beta): GameLaunching=0