SC2178 indefinitely triggers SC2128 when it should not, i.e., after overriding an array variable with a single string

[evandrocoan]

Line 449:
stringarray="${stringarray[1]:10}";
^-- SC2178: Variable was used as an array but is now assigned a string.

Line 450:
if [[ "${stringarray}" != *'^{}' ]];
   ^-- SC2128: Expanding an array without an index only gives the first element.

This was not a mistake, I purposefully overwrote the array with a single string.

The problem is that, after doing that, shellcheck still keeps thinking the stringarray variable is an array, but it is a string and I am correctly accessing it.

Related:

1. SC2178/SC2128 false positives on local variables #680
2. Enhance SC2178/SC2128 errors when the variable is an internal shell array variable #1101
3. inconsistent flagging of SC2178/SC2128 based on local usage #1309