Anamoly Likelihood value for my model do not change after running the mode for 45 min

My model is a anamoly detection model with four feature at start it shows the changes and depicts the anamoly when it occurs but after sometime the likelihood value gets fixed to 0.95 and do not change …What could be reason that the value is not changing.

So the anomaly likelihood value fluctuates for some time, then gets fixed to 0.95 after a certain point. What are the anomaly scores like during this period when the likelihood is fixed?

i will check and let u know