Hi Henrique, Yoroi is completely safe. We have recently deployed version 4.18.0, where we have reworked UTxO syncing. This is what caused the balance issue that you have experienced. However, once you resync your wallet, Yoroi will be working faster than ever.
i have the same issue with the Yoroi sync after a transaction from Coinbase to the Yoroi Wallt.
It was shown the correct value with a “low” status and after few minutes, there was a “load” icon and the value was not shown anymore.
I have the chrome extension wallet on 2 devices. On the other device it was shown correctly, until i resynct it. After that, yoroi shows me only a Balance with 0.