I'm referring to the sports book betting limit on the Stake gambling site, from the data I see it should not matter to the OP, what's more, the bet is only above 0.2 mBtc, it's not a suspicious nominal for Stake I think.
As Stake com says below.LIMITS
At Stake, there are no maximum betting limits. Since you are betting with fully encrypted cryptocurrency, you can bet as much as you like. Of course, we are not saying you bet all of your Bitcoins on one event, but the option is there if you need it.
If you feel safer with a betting limit, you can place your own limits so you don’t make any accidental huge bets.
LIMITS
As with the Stake sportsbook section, there are no betting limits when it comes to the Stake casino. Having said that, certain tables cater to different budget levels. Low-risk players can play for between $1 and $500 per round, while high rollers can increase their stakes considerably, depending on their status tier.
Obviously, not a barrier to betting limits, my assessment, most likely the OP's account has detected a suspicious violation, for that Stake limits and lowers bets for the OP, advice, try to contact your complaint in Chat directly about the problem faced by the OP, what is their response and feedback about this, Honestly, for me, in cases like this, there is a misunderstanding between the Stake team and its users, it could be that the Stake team is suspicious of something that endangers the bookie and the site.