Thyroid and AML treatment

Hi, my wife (58) was diagnosed with Acute myeloid leukaemia (AML) February 2023. She completed Chemo after 6 months of mainly inpatient treatment and a further 12 months of oral Midostaurin.She is now being regularly monitored by her consultant and having 3 monthly bone marrow biopsies which are returning with clear results for residual disease which is fantastic. Karen still struggles with fatigue. Her recent blood test prior to speaking to her consultant showed that she was suddenly showing an overactive thyroid having been previously normal. One suggestion is that this may be due to her Acute myeloid leukaemia (AML) treatment. Has anyone had a similar thyroid reaction? Karen is showing none of the typical signs of an overactive thyroid having.