When I save a big number (length 19), generated randomly with formula, the simulator shows the correct number but when I will see the number in app

or database I see like this image…my column in MySQL is bigint unsigned, then it can store till 20 digits (18… …), but 19 digits is 100% in the allowed range…ok

In fact the Appsheet only use 17 digits and replace the two last numbers to zero, I already try to fill 1234567890123456789 (19 length) explicitly in initial value of the column and Appsheet again cut the last two digits and replace with zero, any limitation?