我有以下问题
\begin{figure}[H]
\centering
\includegraphics[width=0.8\textwidth]{pic6}
\caption*{\textbf{Figure 4.} (left) Dielectric permittivity (\textepsilon') and (right) dielectric loss spectra (\textepsilon'') of (\textbf{8i}). Heating procedure with a step of 5 K. }
\end{figure}
In \textbf{Figure 4}, the dielectric permittivity and dielectric loss spectra of (\textbf{8i}) are presented.
文本看起来正确如下，位于图下方，开头没有段落间隙：
当我稍后尝试在新的图形上执行相同操作时，我发现文本中出现了空白：
\begin{figure}[H]
\centering
\includegraphics[width=0.53\textwidth]{pic7}
\caption*{\textbf{Figure 5.} Simulations of the \textalpha - process on the dielectric loss spectra at different temperatures. }
\end{figure}
\begin{figure}[H]
\centering
\includegraphics[width=0.5\textwidth]{pic8}
\caption*{\textbf{Figure 6.} Superposition of the dielectric function \textepsilon * (top), the electric modulus \textMu * (middle) and the ionic conductivity \textsigma * (bottom) shifted to a reference temperature of 263 K.}
\end{figure}
The superposition of the dielectric function \textepsilon*, the electric modulus M* and the ionic conductivity is presented in \textbf{Figure 6}.
看起来像这样：
这可能是因为我有两个连续的图形，中间没有文字吗？如果是这样，我该如何解决这个问题？
提前致谢