ADA4522 dual supply voltage follower issues

using a ADA4522-2 .

+/-12VDC supplies

sweeping system to test 3dB BW/

signal into the ADA4522 (each config) ~ 1Vpp at 255KHz (see the blue in pic).

output of invertcxonfig looks good.

output of volt follower looks 'oscillatory/slewed.

not sure why??????

any ideas.

meausufing at output of ADA4522 direct with 1Megohm scope probe (i.e. no long cables/capacitance/etc)