About an input filter of LT6106


Please let me know about the input filter of LT6106.
The customer considers LT6106 by the following circuitry.
However, the output of LT6106 oscillates it by this constitution.

LT6106 behaves normally when I insert resistance between LT6106 and capacitors as follows.

Can the input terminal of LT6106 not connect a direct capacitor?
If so, please let me know the reason why LT6106 cannot connect the capacitor to.

If you have any question, please let me know.

Best Regards,