No it's not strange at all for that to happen ... it's entirely expected but has nothing to do with adding harmonics (unless you use a low-quality src, and then it would be inharmonic distortion not harmonics) or emphasising faults
Your Ableton meters display sample values.
Upsampling audio can essentially be thought of as a process of interpolating a curve using the existing sample values, and then resampling this "implied curve" at the higher sample rate.
If the sample values of your original 44.1kHz file are not at the peak amplitude of the waveform* (and the vast majority of the time they're not), then the new sample points at the higher rate will be very likely to contain higher values ...
A visual aid ... imagine that it is your original 44.1kHz file ... new sample values taken on the curve interpolated from the old sample values are very likely to be higher in amplitude ...
So you can see that, because your meters display sample values and not an actual "waveform", it's not at all surprising for an upsampled signal to have a higher peak value than its source.
*this applies not only to recorded audio, but also to synthesised waveforms ... the sample points are "descriptors" of what the waveform will be when it is converted to a continuous signal at the output of your d/a conversion.
Hopefully that makes sense ... if not, research "intersample peaks" and if you end up back on g-slutz, avoid the posts of a certain oldanalogueguy because his relentless and repetitive pedantry might just confuse you