Ref. No. 1153/42-390
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
After all, she was muslim if she didn’t do anything that is obviously kufr. Her aqeeda was not based on kufr. If the case is so, she should be buried according to Islamic norms.
And Allah knows best
Darul Uloom Waqf Deoband