LT8648S for generating +15V and -15V power rails @ 5A max current draw

Hello,

I'm currently working on a design that takes an input voltage of +25.7V and needs to produce a +-15Vdc power rails with the capability of providing peak currents of 10A on each rail. Both power rails will on average individually draw at most 4A. 

At first, I was going to use a typical application design found in the LTC7149 datasheet for a concurrent +-12V supply (see below or page 26 of the LTC7149 datasheet) and modify it to produce the +-15V rails. However, for this to work I would need to parallel the regulators to get the current I need, and it seemed more cumbersome than I wanted. Therefore, I decided to opt for a different approach using the LT8648S.

Now that I've opted to use the LT8648S to produce the +-15V power rails, I am having a little concern regarding this approach working in practice. The schematic I've come up with to produce the +-15V power rails using two LT8648S is below, and the corresponding waveforms are also below. U1 uses the LT8648S in a conventional way, and U2 uses the LT8648S in an inverted topology. The only change that will be made to the schematic for the end design will be a larger soft start cap (10nF or larger). The low pass output filters are implemented to achieve my desired output ripple and filter out high frequency noise from the 1MHz switching frequency. I used the "Designing Second Stage Output Filters for Switching Power Supplies" article to choose the components used for the low pass filter.

My worry is associated with the L2 inductor on the SW pin for U2. It draws a current of ~15.5A upon start up with no load current applied, then L2 draws a current of ~16.5A as the load is powered up and reaches the hypothetical max draw of 10A. Is this something that can result in a failure or destroy U2? 

Is there a different approach or switching regulator I should be using for this application? Are there other switching regulators that I can put in parallel to achieve my desired output current and voltage that would be better suited for this application?