  We present the first results of a high-cadence Swift monitoring campaign
($3-4$ visits per day for $75$ days) of the Seyfert 1.5 galaxy NGC 6814
characterizing its variability throughout the X-ray and UV/optical wavebands.
Structure function analysis reveals an X-ray power law
($\alpha=0.5^{+0.2}_{-0.1}$) that is significantly flatter than the one
measured in the UV/optical bands ($\langle\alpha\rangle\approx1.5$), suggesting
different physical mechanisms driving the observed variability in each emission
region. The structure function break-time is consistent across the UV/optical
bands ($\langle\tau\rangle\approx2.3~\mathrm{d}$), suggesting a very compact
emission region in the disc. Correlated short time-scale variability measured
through cross-correlation analysis finds a lag-wavelength spectrum that is
inconsistent with a standard disc reprocessing scenario
($\tau\propto\lambda^{4/3}$) due to significant flattening in the optical
wavebands. Flux-flux analysis finds an extremely blue AGN spectral component
($F_{\nu}\propto\lambda^{-0.85}$) that does not follow a standard accretion
disc profile ($F_{\nu}\propto\lambda^{-1/3}$). While extreme outer disc
truncation ($R_{\mathrm{out}}=202\pm5~r_g$) at a standard accretion rate
($\dot{m}_{\mathrm{Edd}}=0.0255\pm0.0006$) may explain the shape of the AGN
spectral component, the lag-wavelength spectrum requires more modest truncation
($R_{\mathrm{out}}=1,382^{+398}_{-404}~r_g$) at an extreme accretion rate
($\dot{m}_{\mathrm{Edd}}=1.3^{+2.1}_{-0.9}$). No combination of parameters can
simultaneously explain both results in a self-consistent way. Our results offer
the first evidence of a non-standard accretion disc in NGC 6814.
